Bottle forming machine



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31 Claims. (Cl. 49-9) The present invention relates to a bottle forming machine. In this connection, the manufacture of bottles is the primary concern of the invention. However, it will be readily understood that many of its features may be applied to the production of other glass products, particularly container ware.

It is the prime object of this invention to provide a machine and a process by which such glass products may be made more rapidly. It is a further prime object of the invention to provide a process and a machine by which better quality glass products may be made with fewer rejects.

It is a further object of the invention to provide a machine and process of this kind which will rapidly produce the glass products in a continuous operation from a glass charging point to a ware removing point.

it is a further object to provide a method and machine that make more glass products per unit of time, but which may be operated with a minimum number of men. Particularly it is an object to pro ide such a method and machine having all of the operations that require attention available from one position, and having these operations sufficiently free of complications to be cared for by one man. To this end, it is an object to eliminate, to the maximum extent, interoperations of parts that require precise synchronization to obtain proper operation and satisfactory production of glassware. In particular, it is an object to eliminate the split-second synchronization of neck ring and mold opening and mold closing operations.

It is a further object to provide a method and machine that increase the output of ware per unit of time without great change in the mold rate, or time required for formation of an individual product from an initial charge of glass.

It is a further object to provide a method and machine having a cycle that may be speeded up or slowed down to change the production rate, particularly for adaptation to different sizes of ware. Specifically, it is an object to eliminate the speed limitation imposed by conventional transfer operations.

Another object is to provide a method and machine in which the amount of heat dissipation in the blank molds is a substantially larger proportion of the total heat dissipation for the entire cycle. Specifically, it is an object to provide a system wherein the transfer from blank to blow mold occurs after greater heat dissipation in the blank mold than has heretofore been accomplished with the present type of operation. A particular object is to reduce the ratio of time for making the finish on the ware to total time of the making of the parison in the blank mold.

A further object is to provide a method and machine making better bottles, with even walls and well finished bottoms. Specifically, it is an object to provide a system wherein temperature irregularities in a charge of glass are overcome to a greater degree, where neck ring checks are eliminated. and settle waves are minimized.

2,811,814 Patented Nov. 5, 1957 A further object of the invention is to provide a machine and a process for making glass objects in two separate stages of formation of a parison and subsequent formation of the object from the parison, wherein a relatively stiff parison is formed and transferred from the parison mold to the finish mold. A further object is to provide a machine and a process of this kind by which such relatively stiff parison is formed and transferred, and is subsequently reheated in the finish mold prior to its being nished to the completed ware. A further object is to form a parison, as aforesaid, and to transfer the same while holding it by a part that is not readily injured by the transfer mechanism, to employ a transfer mechanism and system that has a minimum tendency to damage the parison, and particularly a relatively stiff parison that is not as subject to deformation in the transferring operation as is a conventional parison.

A further object of the invention is to provide a machine and process of this kind which will transfer a parison while holding it by a portion relatively near to the center of gravity of the parison, so as to minimize the effect of inertial forces acting upon the parison in the transfer operation. Specifically, it is an object of the invention to provide a machine and a process of this kind wherein bottles or like container ware are formed, and in which the j parison thereof is transferred while it is being held by the bottom of the parison. A fuither object of the invention is to provide a machine and a process of this kind wherein the parison is formed so .as to be completed at the bottom in an area that will be a completed bottom part of the final glassware. A further object is to provide a parison that has substantially the length of the completed ware, and which has a supporting surface at its bottom, whereby it may be introduced into the finish mold and be supported at its bottom therein. Stated generally, on this aspect, it is an object of the invention to provide a machine and a process which eliminate the run or stretchdown of the parison in the finish mold. It is a further object of the invention to provide a machine and a process wherein a relatively stiff parison is formed so as to be supported at its top and at its bottom in the finish mold, and, while so held, is permitted to reheat in the finish mold prior to the introduction of the final finishing operations.

A further object of the invention is to provide a machine and a process of the foregoing type wherein a charge of glass is introduced into a blank mold and is very rapidly forced to the bottom of the blank mold so as to complete the finish of the ultimate ware onto the parison, and is promptly forced back into the blank mold to cornplete the parison with a minimum of dwell of the charge of glass in its forced down condition. A specic object is to cause the forcing back operation aforesaid to complete a section of the opposite end of the parison for the previously mentioned reasons.

A further object of the invention is to provide, particularly in a blow and blow type of machine, a relatively long counterblow operation for the parison, including sufficient time of dwell of the parison in the blank mold, so that it becomes relatively stiff, whereby it may be transferred with minimum damage, and whereby a better product may be produced. A further object is to provide a machine and a process wherein the relatively stiff parison is then transferred to a finish mold, is enclosed in said finish mold, and is permitted to dwell in said finish mold for a substantial period of time, during which it may reheat prior to the final forming operations in the finish mold.

A further object of the invention is to provide a machine and process of this kind wherein an over-all cycle for the formation of the glassware is divided between the formation of a parison and the formation of the com 

